line2            2139 src/diffviewer/ydiff.c     int line1 = 0, line2 = 0;
line2            2160 src/diffviewer/ydiff.c     while (fgets (buf, sizeof (buf), f1) != NULL && line2 <= to2)
line2            2162 src/diffviewer/ydiff.c         line2++;
line2            2163 src/diffviewer/ydiff.c         if (line2 >= from2)